Re: [OMPI users] How to use non-primitive types with Java binding

[Saliya Ekanayake]

Thank you, this is exactly what I was hoping for!!

Saliya
On Jan 18, 2014 2:40 AM, "Siegmar Gross" <
siegmar.gr...@informatik.hs-fulda.de> wrote:

> Hi,
>
> > Anyway I wonder if there are some samples illustrating the use
> > of complex structures in OpenMPI
>
> I'm not sure if my small programs are helpful, but perhaps you get
> an idea how to use the new interface.
>
>
> Kind regards
>
> Siegmar
>
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>

Re: [OMPI users] How to use non-primitive types with Java binding

[Siegmar Gross]

Hi,

> Anyway I wonder if there are some samples illustrating the use
> of complex structures in OpenMPI

I'm not sure if my small programs are helpful, but perhaps you get
an idea how to use the new interface.


Kind regards

Siegmar


BcastStructMain.java
Description: BcastStructMain.java


BcastStructArrayMain.java
Description: BcastStructArrayMain.java


ScatterStructArrayMain.java
Description: ScatterStructArrayMain.java


MyStruct.java
Description: MyStruct.java

Re: [OMPI users] How to use non-primitive types with Java binding

[Saliya Ekanayake]

Thank you and this makes sense. In fact we've been trying to avoid
serialization as much as possible because we found it to be a bottleneck.

Anyway I wonder if there are some samples illustrating the use of complex
structures in OpenMPI

Thank you,
Saliya
On Jan 17, 2014 5:20 PM, "Oscar Vega-Gisbert"  wrote:

> MPI.OBJECT is no longer supported because of it was based on
> serialization, and it made the java bindings more complicated. It brought
> more problems than benefits. For example, it was necessary a shadow
> communicator...
>
> You can define complex struct data using direct buffers and avoiding
> serialization. MPI.OBJECT could be implemented in a higher level layer, but
> serialization is very bad for performance...
>
> Regards,
> Oscar
>
> Quoting Saliya Ekanayake :
>
>  Thank you Oscar. I was using an earlier nightly tarball and in it there
>> was
>> MPI.OBJECT datatype, which I could use with any serializable complex
>> object. It seems this is no longer supported as per your answer or did I
>> get it wrong?
>>
>> Thank you,
>> Saliya
>>
>>
>> On Thu, Jan 16, 2014 at 5:22 PM, Oscar Vega-Gisbert > >wrote:
>>
>>  Hi,
>>>
>>> If you are talking about types as ArrayList, it is not possible,
>>> because the Double (D uppercase) is an object which encapsulates a
>>> double.
>>> And the elements of an ArrayList are references (pointers) to Java
>>> objects.
>>>
>>> You can use complex types but you must create them with the Datatype
>>> methods (createVector, createStruct,...). And the buffers that hold the
>>> data must be arrays of a primitive type or direct buffers.
>>>
>>> Regards,
>>> Oscar
>>>
>>>
>>> Quoting Saliya Ekanayake :
>>>
>>>  Hi,
>>>

 Is it possible to use non-primitive types with MPI operations in
 OpenMPI's
 Java binding? At the moment in the trunk I only see Datatypes for
 primitive
 kinds.

 Thank you,
 Saliya

 --
 Saliya Ekanayake esal...@gmail.com



>>>
>>> 
>>> This message was sent using IMP, the Internet Messaging Program.
>>>
>>>
>>> ___
>>> users mailing list
>>> us...@open-mpi.org
>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>
>>>
>>
>>
>> --
>> Saliya Ekanayake esal...@gmail.com
>> Cell 812-391-4914 Home 812-961-6383
>> http://saliya.org
>>
>>
>
>
> 
> This message was sent using IMP, the Internet Messaging Program.
>
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>

Re: [OMPI users] How to use non-primitive types with Java binding

[Oscar Vega-Gisbert]

MPI.OBJECT is no longer supported because of it was based on  
serialization, and it made the java bindings more complicated. It  
brought more problems than benefits. For example, it was necessary a  
shadow communicator...


You can define complex struct data using direct buffers and avoiding  
serialization. MPI.OBJECT could be implemented in a higher level  
layer, but serialization is very bad for performance...


Regards,
Oscar

Quoting Saliya Ekanayake :


Thank you Oscar. I was using an earlier nightly tarball and in it there was
MPI.OBJECT datatype, which I could use with any serializable complex
object. It seems this is no longer supported as per your answer or did I
get it wrong?

Thank you,
Saliya


On Thu, Jan 16, 2014 at 5:22 PM, Oscar Vega-Gisbert wrote:


Hi,

If you are talking about types as ArrayList, it is not possible,
because the Double (D uppercase) is an object which encapsulates a double.
And the elements of an ArrayList are references (pointers) to Java objects.

You can use complex types but you must create them with the Datatype
methods (createVector, createStruct,...). And the buffers that hold the
data must be arrays of a primitive type or direct buffers.

Regards,
Oscar


Quoting Saliya Ekanayake :

 Hi,


Is it possible to use non-primitive types with MPI operations in OpenMPI's
Java binding? At the moment in the trunk I only see Datatypes for
primitive
kinds.

Thank you,
Saliya

--
Saliya Ekanayake esal...@gmail.com






This message was sent using IMP, the Internet Messaging Program.


___
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users





--
Saliya Ekanayake esal...@gmail.com
Cell 812-391-4914 Home 812-961-6383
http://saliya.org






This message was sent using IMP, the Internet Messaging Program.

Re: [OMPI users] How to use non-primitive types with Java binding

[Saliya Ekanayake]

Thank you Oscar. I was using an earlier nightly tarball and in it there was
MPI.OBJECT datatype, which I could use with any serializable complex
object. It seems this is no longer supported as per your answer or did I
get it wrong?

Thank you,
Saliya


On Thu, Jan 16, 2014 at 5:22 PM, Oscar Vega-Gisbert wrote:

> Hi,
>
> If you are talking about types as ArrayList, it is not possible,
> because the Double (D uppercase) is an object which encapsulates a double.
> And the elements of an ArrayList are references (pointers) to Java objects.
>
> You can use complex types but you must create them with the Datatype
> methods (createVector, createStruct,...). And the buffers that hold the
> data must be arrays of a primitive type or direct buffers.
>
> Regards,
> Oscar
>
>
> Quoting Saliya Ekanayake :
>
>  Hi,
>>
>> Is it possible to use non-primitive types with MPI operations in OpenMPI's
>> Java binding? At the moment in the trunk I only see Datatypes for
>> primitive
>> kinds.
>>
>> Thank you,
>> Saliya
>>
>> --
>> Saliya Ekanayake esal...@gmail.com
>>
>>
>
>
> 
> This message was sent using IMP, the Internet Messaging Program.
>
>
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>



-- 
Saliya Ekanayake esal...@gmail.com
Cell 812-391-4914 Home 812-961-6383
http://saliya.org

Re: [OMPI users] How to use non-primitive types with Java binding

[Oscar Vega-Gisbert]

Hi,

If you are talking about types as ArrayList, it is not  
possible, because the Double (D uppercase) is an object which  
encapsulates a double. And the elements of an ArrayList are references  
(pointers) to Java objects.


You can use complex types but you must create them with the Datatype  
methods (createVector, createStruct,...). And the buffers that hold  
the data must be arrays of a primitive type or direct buffers.


Regards,
Oscar

Quoting Saliya Ekanayake :


Hi,

Is it possible to use non-primitive types with MPI operations in OpenMPI's
Java binding? At the moment in the trunk I only see Datatypes for primitive
kinds.

Thank you,
Saliya

--
Saliya Ekanayake esal...@gmail.com






This message was sent using IMP, the Internet Messaging Program.

[OMPI users] How to use non-primitive types with Java binding

[Saliya Ekanayake]

Hi,

Is it possible to use non-primitive types with MPI operations in OpenMPI's
Java binding? At the moment in the trunk I only see Datatypes for primitive
kinds.

Thank you,
Saliya

-- 
Saliya Ekanayake esal...@gmail.com